Filled bobbin and mdthod of producing the same



Nov. A18, 1924 M. CURRY FILLED BOBBIN AND METI IOD OF PRODUCING THE SAMEFiled Nov. 224 1923 INVENTOR Mata/f (ai/LPM ATTORNEYS 4flatentedfijju-NITED STATES PATENT OFFICE.

sunny, or scAasnALn, naw ronx. nsvsmnon ro 'ma AunnxcAN THREAD COMPANY,0I' NEW YQRX, N. Y., A GOIBPQRATION 0F NEW JERSEY.

'mum-Bonnin AND mur-non 'or-.rnonucme 'rma snm,

Application mea november as, icas. serial m. 676,221.

To whom it may concern: Beit known that l, MALCOLM Otmar, a

citizen of the United States, residing at` Scarsdale, county ofWestchester, State of New York, have invented. certain new. and usefulImprovements in Filled Bobbins and Method of Producing the Same, ofwhich the following is a full, clear, and exact ldescription. V10 1 Myinvention relates to sewingImachine 1 bobbins and method of producingthe same and has for its object to produce a filled bobbin having enddisks of very light weight secured directly to the wound mass so as tonot interfere with the unwinding of the bobbin and yet so as to preventthe 1 round the thread from slipping down so as to surpost of theshuttle.

A further object is to produce a bobbin Awith end supports which willcontain a greater length of thread than existing bobbins of the samedimensions.

A further object is to roduce a self contained bobbin the ends o whichwill be less liable to damage the sewing machine needle should it strikethe ends than the ends of.

existing bobbins with metal shells.

A further object is to produce a bobbin with ends which will preventendwise ab- -sov tion of atmospheric moisture bythe 'boliihin to agreater extent than existing bobbins. v

' A'further 'object is to produce abolcbin having transparent ends andattaining the aforesaid objects.I

.' '-The followingis a description of an embodiment of my invention,reference being had to ,the

accompanying drawings, 1n which, l

Figure bin embodying my invention;

Fig. 2 represents a. plan view of the same; Figs. 3 and 4Ashow amodification; and Figs'. 5, 6 and 7 represent three forms of disk whichmay be used in the manufacture` 'of my improved bobbin.

. Referring more particularly to the drawings, 2 is a tubular core[preferably of fibrous material, such as paper orA pasteboard. d is amass of threadpcross-wound thereon in the usual manner and so that thelen h ofthe mass is approximately equal Vto t e length of the core. 6,-6are two disks composed of stron4 ly coheringilexible material which is aesve when superficially 1 represents a side view of a bobgelatine ispractically colorle, the color of the thread and any surfaceimperfections are'apparentl through the same. The gelarnoistened. Iprefer to use a homogeneous tine ends, moreover, keep the atmospheric lmoisture from entering the' mass through the end faces thereof. lSuchsheet gelatine is sold under the trade name of G1assine.

In manufacturing my bobbin I first windt the thread upon the icore, theends of the core beingI approximately flush with the ends of the mass. Ithen secure to the ends y of the mass disks of the material referred to,whichdisks, when applied, may be centrally perforated as shown at 7 inFig. 5, or may be without perforations as shown at 8 in Fig. 7.. Ifapplied without`being perforated, they can subsequently be perforatedeither by removing a piece the size of the inside of the core, or byforcing a mandrel into the center of the core and pressing the center'ofthe disk into the core and outwardly againstthe inner wall of the core.

"As shown in Figs. 1 and 2 the perforations in the disks are of the samediameter as the internal diameter of the core, and adhere to the core aswellas to the mass so as to stay in position until the bobbin iscompletely unwound, that being desirable.

In applying the disks to the mass, I, in

practice, slightly moisten the disks super- -F {icially on one side andthen apply them to the ends with cient pressure to make them adhere,altho it may be possible ,to slightly meisten the ends ofthe masssuperticially and press the dry disks thereon. I have found that .in thebobbins the adhere-nceI is sufficient to hold the disks in place and, ifthe moistening isl slight,tnot sufiicient to interfere practically withthe unwinding of the thread. The adherence seems to be due to surfacecontact betw en the thread strand and the end pieces, and independent ofthe body of the strand, that is, to the connection between the endpieces and the somewhat delicate that side in contact with sufiiends ofthe core as well proposed to secure pa r :t

thereof or the scope fibres constitutin the'na or u` SllrIOlmding thebody of t e stran t disks when applied, if they do not have perforationsof greater diameter than the internal diameter of the core, may be madeto adhere to the as to the ends of the mass. v I

The cores may. be slightly longer than the mass, and the perforationslarger than the core, in which case, pressure may be applied in theusual bobbln press to compress the mass and upset the ends ofthe core soas to form flanges 9 outside thev disks as shown in Figs. 3 and 4, whichhold the disks in place `after the bobbin has been unwound.

The bobbins may be compd inthe bobbin press and their ends roundedbefore the end pieces are applied; in which case, the gelatine endpieces are molded by the a plying pressure to conform to the shape o theends and retain their formed shape. lin Fig. 5 the disk: has a hole 0fthe a Mw diameter as the bore et the tube. lin Fig. 6 the hole is thesame as the external diameter of the core as in Figs. 3 and l. ln Fig.

l the disk has no hol l l am aware that heretofore it has been to suchmaes by means of muci a. e. Mucila, however, adheres too strong y to thethre and 1s not of itself strongly cohering so as to capable of beingformed into thin pliable sheets as is the case of the gelatine weh l usein forming the ends of my bobbins. Furthermore, pa r thus secured is nottransparent and neither the mass of thread, the color of' the mass, norany im rfections in the mass are visible throughpeit.. The material luse is not onl strongly cohering and dexible but itison y slightlyadhesive when su rficiall moistened.

As wi be evi ent to those skilled in the art, my invention ermits ofvarious modiications without eparting from the spirit of the appendedclaims.

What l claim is: 1. ln a filled bobhfin, the combination of a tubularcore having thereon a cross-Weiland mass of thread of a thicknessapproximately equal to the length of the core, and end pieces com risingstrongly cohering .dexihle material s ightly adhesive wh orallymoistened,V said material able of being famed into thiny said end piecesadhering sligh of the mass.

2. ln a filled hobbin the combation of a tnbur core having thereon acress-rronnd mass of thread having thieltness approximately equal to thelength et the core, and homogeneous transparent end pieces 'coinbeingeapy to the ends en perd.

liable sheets,

attacca Vslightly to the ends of the mass.

3. lin afilled bobbin the combination of a tubular core having thereon across-wound mass of threadof a thickness approximately equal to thelength of the oorenand thin end homo neous pieces of gelatlne adheringslight y to the ends of the mass.

d. lin a lled bobbin, Athe combination of a vtulnilar core havingthereon a cross-Wound mass of thread of a thickness approximately yequal to the length-of the core; and end pieces com rising stronglycoheringdexible material ightly adhesive `when sup-erhcially moistened,said material being capable of being formed into thin pliab e sheets,the ends of the mass, the ends of said core extending through said disksand being upset.

' 5. The method o f forming a filled bobbin, which consists incross-winding a mass of thread upon a tubular core, applyin to the endsof the mass under ressure en f? pieces of strongly cohering flexibleadhesive material and causing them to adhere slightly to said ends.

which consists in cross-winding a mass o thread upon a tubular'core,applying to the faoes'on'f the ends of the mass under pressure thin endpieces of strongly cohering dexible adhesive material one o theopposing' faces of said ends and end pieces being previously slightlymoistened.

7. The method of forming a illed bobbinm which consists in cross-Windinga mass of thread upon a tubular core, superfcially moistening thin endpieces of stron ly eohering flexible material slihtly a hesive whensupercially meistens and applying the same under prure to the ends o themass.

. 8. rlhe method of forming a lled bobbin, which consists incross-Winding a'mass of thread upon a tubular core, superciallymoistening end pieces of thinge atine and said end pieces aeringslightly to aplying the same under pressure to the en

